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Catalytic ozonation water treatment and impurity removal technology based on enhanced electron transfer efficiency

A technology for oxidizing water and electron migration, which is applied in the fields of oxidizing water/sewage treatment, water pollutants, water/sewage treatment, etc., which can solve the problem that the generation of toxic by-product bromate cannot be suppressed, and the toxic by-product of bromate cannot be effectively reduced. , the poor effect of advanced treatment of domestic sewage, etc., to achieve the effect of improving the reaction rate and mineralization capacity, shortening the degradation time, and ensuring the safety of water quality

Active Publication Date: 2019-04-12
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0011] The present invention aims at polluting water containing refractory organic pollutants and bromine, and in order to solve the problem that the existing conventional water treatment effect is poor and the generation of toxic by-product bromate cannot be suppressed, an innovative method is proposed by introducing graphite phase carbon nitride In order to improve the electron transfer ability and promote the cycle of metal ions in the perovskite oxide to promote the generation of more free radicals, a perovskite oxide / graphite carbon nitride catalyst was prepared to realize the conversion of conventional calcium Titanium oxide-catalyzed ozone oxidation technology is enhanced, which can effectively solve the problem of poor advanced treatment of conventional drinking water / urban domestic sewage and the inability to effectively reduce the problem of toxic bromate by-products

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  • Catalytic ozonation water treatment and impurity removal technology based on enhanced electron transfer efficiency

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specific Embodiment approach 1

[0023] Specific embodiment one: the preparation method of perovskite type oxide / graphitic carbon nitride of the present embodiment is: (1) take by weighing 4.0mmol lanthanum nitrate, 4.0mmol cobalt nitrate, 8.0mmol citric acid, the amount of ion total substance The ratio of the concentration to the concentration of the citric acid substance is 1:1; (2) Dissolve the above chemicals in 15mL ethanol and 5mL distilled water to make a complex solution with a certain concentration, and stir at room temperature for 12h; (3) Dissolve the above The complex solution was heated and stirred at 90°C until it was evaporated to dryness, and then ground; (4) the dry powder obtained in step (3) was calcined at 750°C for 4 (heating rate 2°C / min) to obtain LaCoO 3 Solid powder; (5) with 1.5g urea, the LaCoO obtained in 0.5g step (4) 3 Add it into 10mL water and stir for 4h; (6) Dry the suspension obtained in step (5) at 90°C and grind it; (7) Dry the dry powder obtained in step (6) in a semi-clo...

specific Embodiment approach 2

[0024] Specific embodiment two: decontamination technology is realized according to the following steps in the catalytic ozonation system: (1) process required O 3Concentration is 1.0mg / L; (2) perovskite type oxide / graphitic carbon nitride dosage required by the process is 0.25g / L; (3) pollutant concentration in the water body to be treated is 10.0mg / L; ( 4) The concentration of bromide ions in the water to be treated is 100 μg / L; (5) The contact time is 120 minutes; (6) The pH range of the reaction system is 6.40.

[0025] Depend on figure 1 It can be seen that the effect of ozone oxidation degradation of benzotriazole alone is not good, and the efficiency of catalytic ozone oxidation degradation of benzotriazole is improved after adding perovskite oxide or graphite phase carbon nitride. Adding lanthanum cobaltate / graphite phase The efficiency of catalyzed ozone oxidation degradation of benzotriazole is significantly improved when the carbon nitride catalyst is used, and is ...

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Abstract

The invention provides a catalytic ozonation water treatment and impurity removal technology based on enhanced electron transfer efficiency, and belongs to the field of water treatment technology andenvironmental functional materials. A catalyst prepared by the preparation method disclosed by the invention realizes organic combination of a perovskite-type oxide and graphite-phase carbon nitride,so that the active sites of the catalyst can be increased, the decomposition of ozone can be accelerated, the structural defect degree in the catalyst can be improved, the catalytic activity of the nano catalyst is improved, the electron transfer rate is increased, the pollutant degradation time is shortened, and the mineralization and detoxification capability of the pollution removal system is further improved. The catalytic ozonation water treatment and impurity removal technology aims at solving the problem that the existing conventional drinking water treatment has poor removal effect onnovel pollutant benzotriazole, the novel perovskite type oxide / graphite phase carbon nitride is used as the catalyst, the catalyst can be successfully applied to the catalytic ozonation system, the degradation capability of the benzotriazole can be improved, and the catalyst can be used for synchronously inhibiting generation of toxic and side product bromate, and has a wide application prospect.

Description

technical field [0001] The invention relates to a catalytic ozone oxidation water treatment and decontamination technology based on enhanced electron transfer efficiency, and belongs to the technical fields of water supply and drainage science and engineering and water environment protection. Background technique [0002] With the improvement of living standards, people pay more and more attention to the quality of drinking water. However, the conventional drinking water treatment process can no longer meet people's requirements for water quality. In recent years, new pollutants with "three causes" or endocrine disrupting effects - pharmaceuticals and personal care products (PPCPs) have been continuously detected in the surface water environment, which has attracted great attention from scholars from all over the world. Due to the unclear potential toxicity of pollutants such as new pollutants, drugs and personal disposal products, and the difficulty of biochemical treatmen...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/78C02F101/36C02F101/38
CPCC02F1/725C02F1/78C02F2101/36C02F2101/38
Inventor 齐飞张钰婷龙昱瑾邹佳玮刘超宋子龙
Owner BEIJING FORESTRY UNIVERSITY
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